| Organism | Ratio1 | Gene1 | Name1 | Description1 | Ratio2 | Gene2 | Name2 | Description2 | Cofit | Rank |
| Sphingobium sp. HT1-2 | 1.0 | GFF3048 | | Two-component nitrogen fixation transcriptional regulator FixJ | 1.0 | GFF1148 | | Nitrogen regulation protein NR(I), GlnG (=NtrC) | 0.91 | 5 |
| Sinorhizobium meliloti 1021 | 0.48 | SMa1227 | | response regulator FixJ | 0.50 | SMc01043 | | nitrogen assimilation regulatory protein | low | > 103 |
| Rhodopseudomonas palustris CGA009 | 0.45 | TX73_022010 | | response regulator FixJ | 0.49 | TX73_013420 | | nitrogen regulation protein NR(I) | — | — |
| Marinobacter adhaerens HP15 | 0.44 | HP15_1053 | | two component transcriptional regulator, LuxR family | 0.39 | HP15_425 | | two-component response regulator NtrC | low | > 73 |
| Azospirillum sp. SherDot2 | 0.44 | MPMX19_03016 | | Response regulator protein TmoT | 0.49 | MPMX19_01112 | | DNA-binding transcriptional regulator NtrC | — | — |
| Cupriavidus basilensis FW507-4G11 | 0.42 | RR42_RS07355 | | LuxR family transcriptional regulator | 0.36 | RR42_RS12980 | | chemotaxis protein CheY | — | — |
| Paraburkholderia sabiae LMG 24235 | 0.41 | QEN71_RS05715 | | oxygen response regulator transcription factor FixJ | 0.34 | QEN71_RS05675 | | nitrogen regulation protein NR(I) | — | — |
| Ralstonia sp. UNC404CL21Col | 0.41 | ABZR87_RS13480 | | response regulator transcription factor | 0.35 | ABZR87_RS11070 | | nitrogen regulation protein NR(I) | — | — |
| Ralstonia solanacearum PSI07 | 0.41 | RPSI07_RS15805 | | DNA-binding response regulator | 0.35 | RPSI07_RS17815 | | nitrogen regulation protein NR(I) | — | — |
| Dechlorosoma suillum PS | 0.41 | Dsui_2511 | | response regulator | 0.36 | Dsui_1051 | | nitrogen regulation protein NR(I) | low | > 51 |
| Ralstonia solanacearum IBSBF1503 | 0.41 | RALBFv3_RS01680 | | DNA-binding response regulator | 0.35 | RALBFv3_RS15540 | | nitrogen regulation protein NR(I) | — | — |
| Ralstonia solanacearum UW163 | 0.41 | UW163_RS14990 | | DNA-binding response regulator | 0.35 | UW163_RS13000 | | nitrogen regulation protein NR(I) | — | — |
| Ralstonia solanacearum GMI1000 | 0.41 | RS_RS08045 | | DNA-binding response regulator | 0.35 | RS_RS06320 | | nitrogen regulation protein NR(I) | — | — |
| Shewanella loihica PV-4 | 0.41 | Shew_3240 | | two component LuxR family transcriptional regulator (RefSeq) | 0.38 | Shew_3561 | | nitrogen metabolism transcriptional regulator, NtrC, Fis family (RefSeq) | low | > 60 |
| Paraburkholderia bryophila 376MFSha3.1 | 0.41 | H281DRAFT_00464 | | two component transcriptional regulator, LuxR family | 0.36 | H281DRAFT_00454 | | nitrogen metabolism transcriptional regulator, NtrC, Fis family | — | — |
| Burkholderia phytofirmans PsJN | 0.41 | BPHYT_RS12850 | | LuxR family transcriptional regulator | 0.35 | BPHYT_RS12935 | | chemotaxis protein CheY | — | — |
| Paraburkholderia graminis OAS925 | 0.41 | ABIE53_002795 | | FixJ family two-component response regulator | 0.35 | ABIE53_002804 | | two-component system nitrogen regulation response regulator GlnG | — | — |
| Castellaniella sp019104865 MT123 | 0.41 | ABCV34_RS04170 | | response regulator transcription factor | 0.36 | ABCV34_RS03540 | | nitrogen regulation protein NR(I) | — | — |
| Shewanella oneidensis MR-1 | 0.39 | SO4157 | | DNA-binding response regulator (NCBI ptt file) | 0.37 | SO4472 | ntrC | nitrogen regulation protein NR(I) (NCBI ptt file) | low | > 76 |
| Variovorax sp. OAS795 | 0.39 | ABID97_RS14090 | | response regulator transcription factor | 0.34 | ABID97_RS09945 | | nitrogen regulation protein NR(I) | low | > 91 |
| Hydrogenophaga sp. GW460-11-11-14-LB1 | 0.39 | GFF4893 | | Nitrogen regulation protein NR(I) | 0.33 | GFF5269 | | Nitrogen regulation protein NR(I) | low | > 90 |
| Variovorax sp. SCN45 | 0.39 | GFF965 | | Two-component transcriptional response regulator, LuxR family | 0.34 | GFF3066 | | Nitrogen regulation protein NR(I), GlnG (=NtrC) | — | — |
| Dyella japonica UNC79MFTsu3.2 | 0.39 | ABZR86_RS13745 | | response regulator | 0.33 | ABZR86_RS15515 | | nitrogen regulation protein NR(I) | — | — |
| Shewanella sp. ANA-3 | 0.39 | Shewana3_3697 | | two component LuxR family transcriptional regulator (RefSeq) | 0.38 | Shewana3_0258 | | nitrogen metabolism transcriptional regulator, NtrC, Fis family (RefSeq) | low | > 73 |
| Pseudomonas fluorescens GW456-L13 | 0.38 | PfGW456L13_3749 | | Nitrogen regulation protein NR(I) | 0.38 | PfGW456L13_347 | | Nitrogen regulation protein NR(I) | low | > 87 |
| Pseudomonas putida KT2440 | 0.38 | PP_3551 | | DNA-binding response regulator, LuxR family | 0.39 | PP_5048 | | two-component system DNA-binding transcriptional dual regulator GlnL/GlnG | low | > 96 |
| Pseudomonas aeruginosa PA14 | 0.37 | IKLFDK_21605 | | two-component system response regulator BfiR | 0.40 | IKLFDK_27895 | | two-component system response regulator NtrC | low | > 98 |
| Pseudomonas segetis P6 | 0.37 | MPMX49_02030 | | Response regulator protein TodT | 0.39 | MPMX49_04287 | | DNA-binding transcriptional regulator NtrC | low | > 75 |
| Herbaspirillum seropedicae SmR1 | 0.37 | HSERO_RS06700 | | LuxR family transcriptional regulator | 0.34 | HSERO_RS15680 | | chemotaxis protein CheY | low | > 78 |
| Pseudomonas fluorescens FW300-N2C3 | 0.36 | AO356_25435 | | nodulation protein NolW | 0.39 | AO356_09730 | | nitrogen regulation protein NR(I) | low | > 104 |
| Shewanella amazonensis SB2B | 0.36 | Sama_3183 | | response regulator receiver protein (RefSeq) | 0.39 | Sama_3427 | | response regulator receiver protein (RefSeq) | low | > 62 |
| Serratia liquefaciens MT49 | 0.33 | IAI46_06840 | | response regulator transcription factor | 0.39 | IAI46_24960 | | nitrogen regulation protein NR(I) | low | > 87 |
Not shown: 2 genomes with orthologs for GFF3048 only; 80 genomes with orthologs for GFF1148 only